Use product in bedroom at night compared to old filter = Night & Day"lifetime use" is about 5-6 years, this is our 2nd filter for this machine. I believe this would be the only draw back to the filter to me life time use means until death of machine. Machine is noise but that is not the filters fault.

Use product in bedroom at night compared to old filter = Night & Day"lifetime use" is about 5-6 years, this is our 2nd filter for this machine. I believe this would be the only draw back to the filter to me life time use means until death of machine. Machine is noise but that is not the filters fault.